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NCERT · Ganita Prakash · Volume 1 · Chapter 4
Quadrilaterals
45 videos in this chapter
Quadrilaterals
45 videos
Chapter 4
Which Figures Are Quadrilaterals?
3:08
Which Figures Are Quadrilaterals?
You'll learn: Which Figures Are Quadrilaterals?
Chapter 4
What Makes a Rectangle?
3:19
What Makes a Rectangle?
You'll learn: What Makes a Rectangle?
Chapter 4
Why Are a Rectangle’s Diagonals Equal?
2:57
Why Are a Rectangle’s Diagonals Equal?
You'll learn: Why Are a Rectangle’s Diagonals Equal?
Chapter 4
Why Do Rectangle Diagonals Bisect Each Other?
3:02
Why Do Rectangle Diagonals Bisect Each Other?
You'll learn: Why Do Rectangle Diagonals Bisect Each Other?
Chapter 4
Are These Triangle Equalities Enough?
3:04
Are These Triangle Equalities Enough?
You'll learn: Are These Triangle Equalities Enough?
Chapter 4
Equal Diagonals Meeting at Sixty Degrees
3:15
Equal Diagonals Meeting at Sixty Degrees
You'll learn: Equal Diagonals Meeting at Sixty Degrees
Chapter 4
Does Any Crossing Angle Produce a Rectangle?
3:04
Does Any Crossing Angle Produce a Rectangle?
You'll learn: Does Any Crossing Angle Produce a Rectangle?
Chapter 4
Solve the Carpenter’s Rectangle Problem
3:16
Solve the Carpenter’s Rectangle Problem
You'll learn: Solve the Carpenter’s Rectangle Problem
Chapter 4
A Measurement Is Evidence—How Do We Prove a Property?
3:22
A Measurement Is Evidence—How Do We Prove a Property?
You'll learn: A Measurement Is Evidence—How Do We Prove a Property?
Chapter 4
Are Four Right Angles Enough to Define a Rectangle?
3:06
Are Four Right Angles Enough to Define a Rectangle?
You'll learn: Are Four Right Angles Enough to Define a Rectangle?
Chapter 4
Why Are Opposite Sides of a Rectangle Parallel?
3:10
Why Are Opposite Sides of a Rectangle Parallel?
You'll learn: Why Are Opposite Sides of a Rectangle Parallel?
Chapter 4
Every Square Is Also a Rectangle
3:18
Every Square Is Also a Rectangle
You'll learn: Every Square Is Also a Rectangle
Chapter 4
Why Do Square Diagonals Meet at Right Angles?
3:02
Why Do Square Diagonals Meet at Right Angles?
You'll learn: Why Do Square Diagonals Meet at Right Angles?
Chapter 4
Construct a Square From Its Diagonal
3:15
Construct a Square From Its Diagonal
You'll learn: Construct a Square From Its Diagonal
Chapter 4
Why Does a Square’s Diagonal Bisect Its Angles?
3:16
Why Does a Square’s Diagonal Bisect Its Angles?
You'll learn: Why Does a Square’s Diagonal Bisect Its Angles?
Chapter 4
Find the Hidden Angles in Two Rectangles
3:19
Find the Hidden Angles in Two Rectangles
You'll learn: Find the Hidden Angles in Two Rectangles
Chapter 4
Four Crossings, Four Equal-Diagonal Constructions
3:17
Four Crossings, Four Equal-Diagonal Constructions
You'll learn: Four Crossings, Four Equal-Diagonal Constructions
Chapter 4
Make a Right Angle With Diameters, Sticks and Thread
3:12
Make a Right Angle With Diameters, Sticks and Thread
You'll learn: Make a Right Angle With Diameters, Sticks and Thread
Chapter 4
Why Do a Quadrilateral’s Angles Add to 360 Degrees?
3:20
Why Do a Quadrilateral’s Angles Add to 360 Degrees?
You'll learn: Why Do a Quadrilateral’s Angles Add to 360 Degrees?
Chapter 4
Parallel Opposite Sides Do Not Always Make a Rectangle
3:25
Parallel Opposite Sides Do Not Always Make a Rectangle
You'll learn: Parallel Opposite Sides Do Not Always Make a Rectangle
Chapter 4
Construct a Parallelogram From Two Sides and an Angle
3:25
Construct a Parallelogram From Two Sides and an Angle
You'll learn: Construct a Parallelogram From Two Sides and an Angle
Chapter 4
Why Are Opposite Angles Equal in a Parallelogram?
3:16
Why Are Opposite Angles Equal in a Parallelogram?
You'll learn: Why Are Opposite Angles Equal in a Parallelogram?
Chapter 4
Prove the Opposite Sides of a Parallelogram Are Equal
3:19
Prove the Opposite Sides of a Parallelogram Are Equal
You'll learn: Prove the Opposite Sides of a Parallelogram Are Equal
Chapter 4
Parallelogram Diagonals Bisect Each Other
3:21
Parallelogram Diagonals Bisect Each Other
You'll learn: Parallelogram Diagonals Bisect Each Other
Chapter 4
Construct a Rhombus That Is Not a Square
3:19
Construct a Rhombus That Is Not a Square
You'll learn: Construct a Rhombus That Is Not a Square
Chapter 4
Why Is Every Rhombus a Parallelogram?
3:09
Why Is Every Rhombus a Parallelogram?
You'll learn: Why Is Every Rhombus a Parallelogram?
Chapter 4
Rhombus Diagonals Bisect Angles and Cross at Ninety Degrees
3:14
Rhombus Diagonals Bisect Angles and Cross at Ninety Degrees
You'll learn: Rhombus Diagonals Bisect Angles and Cross at Ninety Degrees
Chapter 4
Where Do Squares Fit Among Rectangles and Rhombuses?
3:18
Where Do Squares Fit Among Rectangles and Rhombuses?
You'll learn: Where Do Squares Fit Among Rectangles and Rhombuses?
Chapter 4
Solve Four Quadrilateral Angle Diagrams
3:16
Solve Four Quadrilateral Angle Diagrams
You'll learn: Solve Four Quadrilateral Angle Diagrams
Chapter 4
Construct a Parallelogram and a Rhombus From Diagonals
3:29
Construct a Parallelogram and a Rhombus From Diagonals
You'll learn: Construct a Parallelogram and a Rhombus From Diagonals
Chapter 4
Change a Geoboard Square Into a Rhombus
3:28
Change a Geoboard Square Into a Rhombus
You'll learn: Change a Geoboard Square Into a Rhombus
Chapter 4
Join Equilateral and Isosceles Triangles
3:27
Join Equilateral and Isosceles Triangles
You'll learn: Join Equilateral and Isosceles Triangles
Chapter 4
What Can Two Scalene Triangles Make?
3:42
What Can Two Scalene Triangles Make?
You'll learn: What Can Two Scalene Triangles Make?
Chapter 4
A Kite’s Equal Sides Explain Its Diagonals
3:00
A Kite’s Equal Sides Explain Its Diagonals
You'll learn: A Kite’s Equal Sides Explain Its Diagonals
Chapter 4
Construct a Kite With Diagonals Six and Eight Centimetres
3:07
Construct a Kite With Diagonals Six and Eight Centimetres
You'll learn: Construct a Kite With Diagonals Six and Eight Centimetres
Chapter 4
A Trapezium Has at Least One Pair of Parallel Sides
3:19
A Trapezium Has at Least One Pair of Parallel Sides
You'll learn: A Trapezium Has at Least One Pair of Parallel Sides
Chapter 4
Why Are an Isosceles Trapezium’s Base Angles Equal?
3:15
Why Are an Isosceles Trapezium’s Base Angles Equal?
You'll learn: Why Are an Isosceles Trapezium’s Base Angles Equal?
Chapter 4
Find the Remaining Trapezium Angles
3:11
Find the Remaining Trapezium Angles
You'll learn: Find the Remaining Trapezium Angles
Chapter 4
Can a Quadrilateral Be Both a Kite and a Rectangle?
3:20
Can a Quadrilateral Be Both a Kite and a Rectangle?
You'll learn: Can a Quadrilateral Be Both a Kite and a Rectangle?
Chapter 4
Find an Angle Where Two Rectangles Meet
2:59
Find an Angle Where Two Rectangles Meet
You'll learn: Find an Angle Where Two Rectangles Meet
Chapter 4
A Square Inside a Square
3:26
A Square Inside a Square
You'll learn: A Square Inside a Square
Chapter 4
When Do Equal Sides Force a Special Quadrilateral?
3:14
When Do Equal Sides Force a Special Quadrilateral?
You'll learn: When Do Equal Sides Force a Special Quadrilateral?
Chapter 4
Does the Angle Sum Still Work for a Concave Quadrilateral?
3:28
Does the Angle Sum Still Work for a Concave Quadrilateral?
You'll learn: Does the Angle Sum Still Work for a Concave Quadrilateral?
Chapter 4
Seven Quadrilateral Claims: Proof or Counterexample?
3:36
Seven Quadrilateral Claims: Proof or Counterexample?
You'll learn: Seven Quadrilateral Claims: Proof or Counterexample?
Chapter 4
Which Quad? Predict the Shape Made by Folding
3:32
Which Quad? Predict the Shape Made by Folding
You'll learn: Which Quad? Predict the Shape Made by Folding